10-18

Question 1

Indications for lateral cephalometric projection

Answer 1

Ortho/Growth and Development
Orthognathic Surgery Eval
Anterior-posterior view of paranasal sinuses

Question 2

Indications for posterior-anterior cephalometric projection

Answer 2

Ortho/Growth and Development
Orthognathic Surgery Eval
Mediolateral developmental changes
Facial asymmetry

Question 3

Demonstrations of Waters projection

Answer 3

Maxillary Sinuses
Orbits
Mid-facial bones

Question 4

Demonstrations of Submentovertex projection

Answer 4

Skull base
Sphenoid Sinus
Mandibular condyles
Zygomatic Arches

Question 5

Indications for Reverse Towne projection

Answer 5

Occiput
Subcondylar Fractures

Question 6

Anterior Maxillary Occlusal Projection vs Topographic Maxillary Occlusal Projection

Answer 6

Anterior Maxillary Occlusal Projection = (+)45 degrees through TIP of nose
- Canine to canine
Topographic Maxillary Occlusal Projection = (+) 65 degrees through BRIDGE of nose
- 2nd molar to 2nd molar

Question 7

Lateral Maxillary Occlusal Projection

Answer 7

(+) 65 degrees through 2 cm below lateral canthus of eye (rotated 90 degrees)
- Lateral incisor to contralateral 3rd molar

Question 8

Anterior Mandibular Occlusal Projection vs Topographic Mandibular Occlusal Projection

Answer 8

Anterior Mandibular Occlusal Projection: (-) 55 degrees through tip of chin

Topographic Mandibular Occlusal Projection: Perpendicular to receptor through floor of mouth
- Best for floor of mouth

Question 9

Lateral Maxillary Occlusal Projection

Answer 9

Perpendicular to receptor
(beneath chin, 3 cm posterior, 3 cm lateral to midline)

Question 10

Indications for Occlusal Radiography

Answer 10

Large Segment of dental arch
Limited opening

Question 11

What type of image receptors does NOT work with occlusal radiography?
What plates do we use and what are the sizes?

Answer 11

SSS
Phosphor Plates: 0,1,2,4